Enhanced surveillance of invasive meningococcal disease in Canada: 1 January, 1999, through 31 December, 2001.
D017677:Age Distribution; D002170:Canada / Q000453:epidemiology; D004196:Disease Outbreaks; D005260:Female; D006801:Humans; D015994:Incidence; D008297:Male; D008589:Meningococcal Infections / Q000453:epidemiology* / Q000382:microbiology / Q000401:mortality; D009345:Neisseria meningitidis / Q000145:classification; D011159:Population Surveillance; D012621:Seasons; D012703:Serotyping